For 12 cupcakes: 125g butter, 140g caster sugar, 100g flour, 25g custard powder and 3 eggs. Kirsty wants to make 40 cupcakes. she has 500g of caster sugar. Does Kirsty have enough caster sugar to make 40cupcakes?

step-by-step explanation:

option (a)

step-by-step explanation:

step 1:   take 2 number whose product equal to 25..

and sum of those two number are -10

step: 2 for example here if we take 5,5 are the number,,

5*5=25

and

5+5=10

but we need -10

so if we take   -5,-5

so -5*-5=25

and -5+(-5)=-10

s0

come the equation

replace -10x by these number

like -5x -5x+25

take common

x(x-5)-5(x-5)=0

(x-5)(x-5)=0